zZz Hóng hớt zZz bảo off thì off đi . 

7 - x = 8 - (- 7)

7 - x = 15

x = 15 - 7

x =8

1. He couldn't go to school because of his illness.

=> Because he was ill so he couldn't go to school

2. Would you like to go to the zoo with me?

=> How about going to the zoo with me?

3.My sister plays badminton skillfully.

=> My sister is a skillful badminton player

4. I don't like candies either.

=> Neither do I

5. My mother doesn't like coffee and tea.

=> My mother likes neither does

1000kg/m³

1000 Kg/m³

Giới hạn đo của thước là độ dài lớn nhất ghi trên thước

Độ chia nhỏ nhất của thước là độ dài giữa 2 vạch chia liên tiếp trên thước